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Posisjon	Uttrykk	Side	Utdrag
8	a cdot x	/questions/101652/ho...	differential equations - How to solve $x' = A\cdot x 10 дек. 2015 г. — If by "solve" you mean find xp (x′) when A and x are given... well, then simply xp = A.x . If instead you want to find x given A and x′, then x ...
13	y 2 3d	/questions/10710/how...	How do I plot $x^2+y^2=1$ in 3D? 16 сент. 2012 г. — How about a 3D contour plot. ContourPlot3D[x^2 + y^2 == 1, {x, -2, 2}, { y , - 2 , 2}, {z, -2, 2}].
29	d 2 u	/questions/56892/sol...	differential equations - Solve ODE $d^2u/dx^2 + u/A = 0 7 авг. 2014 г. — Your ODE u ″(x)+1A u (x)=0. with constant coefficients has the characteristic polynomial p(λ)=λ 2 +1A!=0. with the corresponding zeros λ1/ 2 =±i√A.

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Posisjon	Uttrykk	Side	Utdrag
4	знак системы	/questions/262399/sy...	syntax - Symbol of system of equations - Mathematica Stack... I'm wondering if there is a way to use the symbol (the left curly bracket) of a system of equations.

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